Automatic vacuum and gravity feed



C. I.. FETTY ET AL AUTOMATIC VACUUM "AND GRAVITY FEED Filed Auzf24. 1923 2 Sheets-Sheet l QN W JSS. mg? .ajkz/a m im. T

\\t uf 5L-p '50 N N WN C. L. FETTY ET AL AUTOMATIC VACUUM AND GRAVITY FEED Filedv Aug. 24, 1923 2 Sheets-Shoot 2 Patented Oct. 21 1924.

UNITED STATES PATENT OFFICE.

CLARENCE L. FETTY AND ALFRED A. HOSLER, OF AKRON, OHIO.

AUTOMATIC VACUUM .AND GRAVITY FEED.

Application led August 24, 1923.

To aZZ- Qviom. it may concern:

Be it known that we, CLARENCE L. Fn'r'rY and ALFRED A. HosLnR, citizens of the United States, residing at Akron, in the county ot Summit and State of Ohio, have invented a new and useful Automat-ic Vacuum and Gravity Feed, ot which the following is a specification.

This invention relates to valves for admitting and controlling the auxiliary air supply for internal combustion engines.

The object of the invention is to provide a simple and efficient device of this character which may be readily applied to .an intake manifold of an internal combustion engine and which will automatically function under varying operating conditions of the engine -to admit the necessary amo-unt of air or 'to cut ott such air supply as requirements may demand and which takes care ot kall surplus gases that are .not properly mixed.

wWith the foregoing and other objects 1n view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in fthe details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings Figure 1 represents a longitudinal section of the valve constituting this invention with the parts shown in the position' assumed. when the engine is idling or running up to 350 revolutions per minute.

Y Fig. 2 is a similar view with the parts in the position assumed when the engine is running ten miles per hour or less.

Fig. 3 is a similar view showing the position the parts assume when the speed is over ten miles per hour.

Fig. 4 is a transverse section taken on the line 4 4 of Fig. 2; and

Fig. 5 is a similar view taken on the line 5-5 or Fig. 3.

In the embodiment illustrated the device constituting this invention comprises a piston 1 having a stem 2 to be threaded into the intake manifold M ot an internal combustion engine and which is secured in position by a lock nut 3. The piston land Serial No. 659,185.

stem 2 have a bore 4 extending longitudinally therethrough Jfrom end to end thereof and communicating respectively with the manifold M and with the interior of a cylinder 2O which, reciprocates on the piston as will be hereinafter more fully described.

A compression spring 6 is located within the cylinder 20 between the outer' end of the piston and a cap 7 swiveled on the inner end of an adjusting screw 8 which has threaded Iengagement with the outer end of the cylinder and which is held in adjusted position by a lock nut 9. A boss 5 is shown formed on the outer end of piston 1 around which the inner end of spring 6 is coiled and which holds the spring against lateral movement.

The piston 1 is provided in its perimeter at a point :spaced inwardly from its outer end with an annular groove 10 which is one-sixteenth of an inch deep and from which lead to the bore 4 four radially disposed conduit-s 11 arranged in planes at right angles to each other, connecting said groove with the bore for a purpose presently to be described.

Spaced inwardly from groove 10 a suitable vdistance is a similar groove 12 which is three-thirty-seconds of an inch deep with eight conduits 13 connecting it with the bore 4. The conduits 13 are one-sixteenth of an inch in diameter and radiate from bore 4 asshown in Fig. 5 being spaced equal distances apart the purpose of which will be presently described.

The piston 1 is also provided with piston ring grooves 14 and 15 one being located between grooves 10 and 12 and the other at the rear of groove 12 and which are designed to form a fluid tight connection between the piston and the cylinder.

The cylinder 2O is provided about inidway its ends with diainetrically opposite apertures 21 and 22 which are one-sixteenth of an inch in diameter and are designed to admit air tothe cylinder when the engine is idling or running up to 350 revolutions per minute. The apertures 21 and 22 connect the chamber 16 in the cylinder 2() with the atmosphere when the parts are in the position shown in Fig. 1 and when the engine is started the suction thereof will draw air in through the bore 4 and these openings and produce in the chamber a vacuum which in connection with spring 6 will opcrate to draw the cylinder 20 inWard over the piston l against the tension ospring '6 unt-il the apertures 2l and 22 register With the groove l0 as shown in Fig. 2. When this occurs thevcon'duits 1l, four of which are provided, Will permit suiicient air to enter the engine to produce afproper mixture When the engine is running up to ten miles per hour. The tension spring 6 is then adjusted by means of the screw 8 and nut 9 and Vheld in this positionso that air Vwill be drawn through openings 21 and 22 into groove 10 and thence pass' through conduits ll and bore @tothe manifold producing a proper V'mixture until ten mile speed is exceeded. lVhen the engine runs faster than ten miles per hour the vacuum in chamber 1G is lost andthe 'cylinderQO is released and moves outward until the opening i23 thereinregisters With the ,groove`l2- This opening `23is'live-thirty-seconds of an inch in diameter and 'Whenregistering with groove l2 is designed to admit suhicient air to the Vcylinder through 'the eight conduits lto `produce a proper mixture when the motor is running faster Athan tenmiles per hour.

I A stop or safety screw 121i ex-tends laterallythrough'the Vinner end 'of cylinder 2O in the path ofthe-inner end Vof thejpiston l and operatesjto rlimit'the outward movement of the cylinder and topreven't its accidental detachment `Vtrom thepiston.

When lthe engineisrunning ten 'milesor more the parts Will remain in 'the'position shown in Fig.A 3 and'will take care of all surplusgasesthat are'not properly mixed.

v"We claim v "han Vauxiliaryfair 'intake and regulating valve for internal "combustion jengines comprising,agpiston enclosed Within la cylinder, said piston having abore extending longitudinally therethrough and provided Witha peripheral groove and having con` duits connecting said groove and'bore, said cylinder having an aperture to register at predetermined intervals "With said groove and 'at other intervals. With the interior of the cylinder above the piston, and means lcontrolled bythe lsuction inthe engine in connection kWith which the device is used 'ton having a plurality for regulating the position of said aperture whereby more or less air is admitted through said bore.

2. An auxiliary air intake and regulating valve for internal combustionfengines coniprising a piston havingr a bore extending longitudinally'therethrough and adapted to be secured to an intake manifold, said pisof longitudinally spaced peripheral grooves with radial conduits connecting them `with said bore, one groove having more conduits than the other, a cylinder encasing said pistonl and reciprocable thereon, said cylinder having a plurality of 'apertures arranged at longitudinally spaced intervals'to register alternately With said grooves for supplying.greater or less quantity of air to the manifold, and an adjustable spring located between said cylholdingr them in relainder and piston for tive position, the suction ofthe engine controlling the 'amount of air supplied to the piston.

An auxiliary air intake and regulating valve for internal vcomlnistion engines 'coniprising .apiston having Va bore extending longitudinally therethrough and adapted to `be secured to an intake manifoldsaid pistonhavin-giaV alurality of longitudinally spaced peripheral grooves with radial conduits connecting them Vwith said bore, one groove having more conduits than the other, a cylinder encasing saidpiston and reciproca'ble'thereon, lsaid cylinder `having a plurality of apertures arranged at longitudinally spaced intervals'to reo'ister 'alternately with said grooves Yfor suppllying, greater or less quantityrdf air' to"the`manifold, andan adjustable spring'locatedlbetn'een said ovli'nder and piston for holding them inrelative'position,`the suction of the engine controlling the amount of air suppliedto the piston, and means for limiting themovement or said cylinder relativelytothe;pis ton to prevent its 'accidental detachment..

lIn testimonythat We `claim the foregoing` as 'our own, We have 'hereto aixed our signatures.

CLARENCE `L. FETTY ALFRED A. 'HOSLER 

